Entanglement properties of the harmonic chain

被引：336

作者：

Audenaert, K ^{[1
]}

Eisert, J

Plenio, MB

Werner, RR

机构：

[1] Univ London Imperial Coll Sci Technol & Med, QOLS, Blackett Lab, London SW7 2BW, England

[2] TU Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany

来源：

PHYSICAL REVIEW A | 2002年 / 66卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.66.042327

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the entanglement properties of a closed chain of harmonic oscillators that are coupled via a translationally invariant Hamiltonian, where the coupling acts only on the position operators. We consider the ground state and thermal states of this system, which are Gaussian states. The entanglement properties of these states can be completely characterized analytically when one uses the logarithmic negativity as a measure of entanglement.

引用

页数：14

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